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Racing Exhaust System for the GP420 (42CC) and GP460 (46CC) engine. Features strong 4-point mounting system and integrated stinger style muffler. Includes all hardware necessary, instructions for installation & new exhaust gasket. This is the pipe which makes these engines come alive. The first power surge arrives right after the clutch engages for an AWESOME hole shot or wheelie! Also adds 4 - 5 mph or more of top speed. Fits GTR40 / GTR46 / SGSR42R / SGSR46R. Sweet Nickel-Plated Finish.